@article {12772,
	title = {Broadband tunable pre-bunched electron cyclotron maser for terahertz application},
	journal = {IEEE Transactions on Terahertz Science and Technology},
	volume = {5},
	year = {2015},
	pages = {236-243},
	abstract = {The relativistic electron cyclotron maser (ECM) has been successfully applied to generating high-power THz wave. In order to realize the additional advantages of broadband tuning and high efficiency interaction, this paper is devoted to exploring the THz pre-bunched ECM. Other than a conventional open-cavity tunable gyrotron consecutively switching between axial modes to realize frequency tuning, a pre-bunched ECM system operates on the backward traveling-wave resonance to achieve broadband smooth tuning. Especially, an interaction circuit of specified axial profile of beam-wave detuning frequency is built to achieve high efficiency. An optimized 0.1 THz pre-bunched ECM system using an electron beam of 30 kV voltage and 3 A current is predicted to generate broad bandwidth of 10 GHz and efficiency between 10\% ~ 25\%. The broadband tuning pre-bunched ECM is promising for a new generation of broadband and high-power THz source.},
	url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6983638},
	author = {Chao-Hai Du and Xiang-Bo Qi and Pu-Kun Liu*}
}
